<template>
  <el-container>
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" id="img" />
        <span>电商后端管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 侧边栏 -->

    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse='isCollapse'
          :collapse-transition ="false"
          router
          :default-active="activepath"
        >
        <!--| ???? -->
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-location"></i>
              <!-- 文字 -->
              <span>{{ item.authName }}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subIem.path"
              v-for="subIem in item.children"
              :key="subIem.id"
              @click="saveNavstate('/' + subIem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文字 -->
                <span>{{ subIem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 主页面 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      menulist: [],
      // 是否折叠
      isCollapse:false,
      // 未被激活的地址
      activepath:''
    };
  },
  created() {
    this.getMenuList()
    // this.activepath = window.sessionStorage.setItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push({ path: "/login" });
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      // console.log(res);
      if (res.meta.status !== 200)
        return this.$message.console.error(res.meta.msg);
      this.menulist = res.data;
      console.log(res);
    },
    // 点击按钮进行折叠合展开
    toggleCollapse(){
    this.isCollapse=!this.isCollapse
    },
    // 保存链接的激活状态
    saveNavstate(activepath) {
      // window.sessionStorage.setItem("activePath", activepath);
      this.activepath =activepath
    },
  },
};
</script>
<style scoped>
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.el-header div span {
  padding-left: 15px;
}
.el-aside {
  background-color: #333744;
}
.el-menu{
  border: 0;
}
.el-main {
  background-color: #eaedf1;
  
}
.toggle-button{
  background-color: #333744;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
.el-container {
  height: 100vh;
}
#img {
  width: 57px;
  height: 57px;
}
</style>